Dead But Alive

Min Yoongi gets into a train accident and nearly dies..Ever since then things were different for him, he could see ghosts and other unusual things, his body developed immortal powers of rapid healing and every time he went to sleep his soul would roam around unnoticed by the living.
A soul was attached to him. A girl in her mid twenties, she wanted him. But she was dead, so she tried to kill him so that she can have him forever, and only for HERSELF.